“Her hands were bound behind her back with packing tape and a trash bag was placed over her head and wrapped tightly,” said Commonwealth Attorney Linda Tally Smith describing the scene where the body of 42-year-old Michelle Mockbee was found. “She was lying in a pool of her own blood, all of her belongings were lying nearby.”

Dooley is accused of killing Mockbee at Thermo Fisher Scientific in Florence in 2012.

Tally Smith told the jury during opening statements that every other employee at the Thermo Fischer Scientific plant could be tracked by a series of swipe cards and other electronic devices the morning of the slaying, but not Dooley.

There will be no “smoking gun” Tally Smith admitted, saying jurors would have to look at the totality of the evidence to see the picture that makes Dooley the killer.

Tally Smith accused Dooley saying after he killed Mockbee he cleaned up the crime scene, making it difficult for investigators.

“Literally, anywhere in that building there are latex gloves, work gloves, trash bags, screwdrivers, box cutters, scalpels, knives and Tyvex suits like those worn by crime scene investigators,” Tally Smith said.

But Dooley’s attorney, Chris Roach, told the jury the case against his client is missing every critical element, including a motive and any DNA evidence linking Dooley to the crime.

Roach told the jury more than 100 items were tested.

“The items that they had tested were sent to KSP and all of those items came back as excluding David Dooley or as inconclusive,“ Roach said.

The defense said investigators target Dooley from the very beginning and didn’t explore any other leads.

“The commonwealth must show beyond a reasonable doubt that David Dooley murdered Michelle Mockbee. I’m confident by the end of this trial, they will fail that burden,” Roach said.

The first witnesses are expected to be called Friday, the jury is scheduled to visit the scene of the crime on Sept. 25.

Dooley provided janitorial services at the facility where Mockbee worked as logistics support representative.

The case has been in and out of court over DNA evidence since the charges were first brought against Dooley.